1. Determine the mass of 6.022 X 10^23 number of N2 molecules.2. Calculate the number of particles in-(i) 8 g of O2 molecules (ii) 2.5 mol of calcium atoms.3. What is the mass of 2.5 mol of Methane?4.Find the mass of one molecule of water.5.Calculate the number of water molecules and number of oxygen and hydrogen atoms in a drop of water containing 0.03 mol of water.6. Calculate the actual mass of one atom of carbon if 12 grams of Carbon contain one mole of Carbon.7. Calculate mass of Nitrogen (N2) which contains same number of molecules as are present in 4.4 grams of Carbon-di-oxide (CO2).8.Atomic mass of gold is 197 u. How many moles of gold are present in an ornament containing 88.65 grams of gold?9. How many moles of SO2 have same mass as 3 moles of oxygen?10. A glass of water contains 5 mol of water. How many molecules of water arepresent?11. What is the mass of a formula unit of Na + C l - ?12. How many atoms of Silver are present in a silver wire weighing 5.4 grams?13. Calculate the ratio of molecules present in 16 g of methane and 16 g of oxygen.14. Convert into mole. (a) 12 g of oxygen gas (b) 20 g of water (c) 22 g of carbon-dioxide.15. Determine the number of bromide ion in 0.2 mole of Mg Br2.th Mole concept numerical problems solved-9Download File9th Mole concept numerical problems solved-10Download FileClass 9 Atoms and molecules solved CBSE Papers New links﻿﻿More Problems based on mole concept9th Atoms and Molecules - 1. Mole Concept and Problems based on mole concept2. Numerical Problems based on mole concept 9th Chemistry3. Numerical based on mole concept byChemistryAdda

u are stupid what type of questions are there are u mad or what annyzzz... it is helpful but not also thannksxx...

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aditya

9/1/2017 06:17:00 pm

Good numericals

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Sunil sahhab &lt;ADMIN&gt;

16/1/2017 07:13:26 am

i will put answers guys

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Kriti....

29/1/2017 06:53:36 am

Sir kab daloge sirf one word answer to daalo so we can check ourselves bcoz these are really nice questions sir

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Kriti....

29/1/2017 06:51:04 am

Agree with all I HV solved all the quesstions and the calculation is too lengthy so I think we must hv . the answer key if not the solutions to check where we are going wrong...isn't that correct friends.. We can verify our answers over here too no.plz comment & let me know